Re: multiple pattern regular expression
On Apr 25, 8:37 pm, Arnaud Delobelle [EMAIL PROTECTED] wrote:
micron_make [EMAIL PROTECTED] writes:
I am trying to parse a file whose contents are :
parameter=current
max=5A
min=2A
[snip]
If every line of the file is of the form name=value, then regexps are
indeed not needed. You could do something like that.
params = {}
for line in file:
name, value = line.strip().split('=', 2)
params[name] = value
(untested)
Then params should be the dictionary you want.
I'm also interested in this problem. While this solution works, I'm
looking for solution that will also check whether the parameter name/
value is of a certain pattern (these patterns may be different, e.g.
paramA, paramB, paramC may take integers value, while paramD may take
true/false). Is there a way to do this easily?
I'm new to Python and the solution I can think off involve a loop over
a switch (a dictionary with name-function mapping). Is there other,
more elegant solution?
Chris
--
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Hi ! This is my first message . I new here . I like python , blender 3d and opengl and is a hobby for me. I have a site www.catalinfest.xhost.ro where i write about me and python , blender ... I hope learning more on this group . Have a nice day ! -- http://mail.python.org/mailman/listinfo/python-list
Re: multiple pattern regular expression
Chris Henry [EMAIL PROTECTED] writes:
On Apr 25, 8:37 pm, Arnaud Delobelle [EMAIL PROTECTED] wrote:
micron_make [EMAIL PROTECTED] writes:
I am trying to parse a file whose contents are :
parameter=current
max=5A
min=2A
[snip]
If every line of the file is of the form name=value, then regexps are
indeed not needed. You could do something like that.
params = {}
for line in file:
name, value = line.strip().split('=', 2)
^ 1, obviously!
params[name] = value
(untested)
Then params should be the dictionary you want.
I'm also interested in this problem. While this solution works, I'm
looking for solution that will also check whether the parameter name/
value is of a certain pattern (these patterns may be different, e.g.
paramA, paramB, paramC may take integers value, while paramD may take
true/false). Is there a way to do this easily?
I'm new to Python and the solution I can think off involve a loop over
a switch (a dictionary with name-function mapping). Is there other,
more elegant solution?
Sounds good to me.
E.g.
def boolean(x):
if x == 'true':
return True
elif x == 'false'
return False
else:
raise ValueError(Invalid boolean: '%s' % x)
paramtypes = { 'paramA': int, ..., 'paramD': boolean }
#Then
for line in file:
line = line.strip()
if not line: continue
name, value = line.split('=', 1)
if name in paramtypes:
try:
value = paramtypes[name](value)
except ValueError, e:
# handle the error
value = e
else:
# What to do for untyped parameters
pass
params[name] = value
--
Arnaud
--
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Re: function that accepts any amount of arguments?
On Apr 25, 2:12 am, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: On 24 avr, 14:28, malkarouri [EMAIL PROTECTED] wrote: On Apr 24, 12:43 pm, Bruno Desthuilliers [EMAIL PROTECTED] wrote: [...] Not quite sure what's the best thing to do in the second case - raise a ValueError if args is empty, or silently return 0.0 - but I'd tend to choose the first solution (Python's Zen, verses 9-11). What's wrong with raising ZeroDivisionError (not stopping the exception in the first place)? Because - from a semantic POV - the real error is not that you're trying to divide zero by zero, but that you failed to pass any argument. FWIW, I'd personnaly write avg as taking a sequence - ie, not using varargs - in which case calling it without arguments would a TypeError (so BTW please s/Value/Type/ in my previous post). The problem with passing it as a sequence is, if you want to call it, you may have to wrestle with this odd looking code: avg((3, 4, 6, 7)) rather than this, more natural code: avg(3, 4, 6, 7) And FWIW, the OP asked if it is possible to pass variable amount of arguments, avg is just a mere example of one where it could be used not where it could be best used. Nick Craig-Wood wrote: Steve Holden [EMAIL PROTECTED] wrote: Ken wrote: Steve Holden [EMAIL PROTECTED] wrote in message [...] def mean(*x): total = 0.0 for v in x: total += v return v/len(x) think you want total/len(x) in return statement Yes indeed, how glad I am I wrote untested. I clearly wasn't pair programming when I wrote this post ;-) Posting to comp.lang.python is pair programming with the entire internet ;-) No, actually it's pair programming with the readers of c.l.py (or more accurately with the readers of c.l.py that happens to pass the said thread). -- http://mail.python.org/mailman/listinfo/python-list
problem with listdir
hi i have a directory containing .pgm files of P5 type.i wanted to read the pixel values of these files ,so as a firststep i wrote code to make a list of filenames using listdir pgmdir=f:\code\python\pgmgallery # where i have pgm files g2=listdir(pgmdir) i get the following error WindowsError: [Error 123] The filename, directory name, or volume label syntax is incorrect: 'f:\\code\\python\pgmgallery/*.*' i am running python on winXP ..can anyone tell me why i get this error? -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with listdir
i get the following error WindowsError: [Error 123] The filename, directory name, or volume label syntax is incorrect: 'f:\\code\\python\pgmgallery/*.*' i am running python on winXP ..can anyone tell me why i get this error? -- From some Googling, it looks like this error can happen in Windows when you have registry problems. This isn't a Python problem as far as I can tell. A few things for you to try: * Try running your code on another machine with the same directory. * Run cmd.exe and see if you can run dir f:\\code\\python\pgmgallery/*.* * Try using other drives besides F: (C: is a good start) * Try using other directories under F: drive in your program and see when you start hitting the problem. David. -- http://mail.python.org/mailman/listinfo/python-list
Re: Desktop notifications on Windows
On Sat, Apr 26, 2008 at 4:41 AM, [EMAIL PROTECTED] wrote: I'm looking for a way to implement desktop notifications (much like an instant messaging program or a mail notifier) within my Python application, on Windows only (no Gtk/Galago, please). I need no more than a simple text-based notification, which should be clickable and have a timeout, nothing else. I do not want to use Windows's balloon tips, either. Any suggestions? -- You could use Tkinter, which comes with Python. -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with listdir
On Sat, 26 Apr 2008 01:24:23 -0700, jimgardener wrote: hi i have a directory containing .pgm files of P5 type.i wanted to read the pixel values of these files ,so as a firststep i wrote code to make a list of filenames using listdir pgmdir=f:\code\python\pgmgallery # where i have pgm files g2=listdir(pgmdir) i get the following error WindowsError: [Error 123] The filename, directory name, or volume label syntax is incorrect: 'f:\\code\\python\pgmgallery/*.*' i am running python on winXP ..can anyone tell me why i get this error? Did you try using a raw string as pathname pgmdir=rf:\code\python\pgmgallery ? AFAIK, the character '\' in interpreted in Python as the beginning of an escape sequence (such as '\n') and it should be doubled ( as in the error message) or a raw string should be used, telling Python that there are no escape sequences inside. However, from the message it looks like the path as been understood as such, so this might not be the case. Ciao - FB -- http://mail.python.org/mailman/listinfo/python-list
Re: display monochromatic images wxPython
On Fri, 25 Apr 2008 14:42:17 -0700, [EMAIL PROTECTED] wrote: Dear All, I want to write a GUI program with wxPython displaying an image. But the image I have is monochromatic. When I retrieve the data from the image I end up with a list of integer. Starting from a list of integer and knowing the width and height of the image, how do I display such an image on a wx panel or frame ? I have had a look at the wxPython demo but there I see only images where the data is a list of tuple consisting of r,g ,b values. Is there are function where I directly can input the list of array and let it display the image ? Thanks in advance RR I think that RGB colors with the same amount of R,G, and B levels always result in some shade of gray. If so, you could try building your image data by convering each numver in a triplet of equal numbers. Ciao FB -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with listdir
On Sat, 26 Apr 2008 19:07:45 +1000, Francesco Bochicchio [EMAIL PROTECTED] wrote: On Sat, 26 Apr 2008 01:24:23 -0700, jimgardener wrote: hi i have a directory containing .pgm files of P5 type.i wanted to read the pixel values of these files ,so as a firststep i wrote code to make a list of filenames using listdir pgmdir=f:\code\python\pgmgallery # where i have pgm files g2=listdir(pgmdir) i get the following error WindowsError: [Error 123] The filename, directory name, or volume label syntax is incorrect: 'f:\\code\\python\pgmgallery/*.*' i am running python on winXP ..can anyone tell me why i get this error? Did you try using a raw string as pathname pgmdir=rf:\code\python\pgmgallery ? AFAIK, the character '\' in interpreted in Python as the beginning of an escape sequence (such as '\n') and it should be doubled ( as in the error message) or a raw string should be used, telling Python that there are no escape sequences inside. However, from the message it looks like the path as been understood as such, so this might not be the case. Ciao - FB Neither \c nor \p are escape characters in Section 2.4.1 String literals. Could there be some files in that directory whose name is not a valid Windows file name? Windows file names cannot have the following symbols: \ / : * ?| -- Kam-Hung Soh a href=http://kamhungsoh.com/blog;Software Salariman/a -- http://mail.python.org/mailman/listinfo/python-list
Re: nntplib retrieve news://FULL_URL
So I have established a connection to an nntp server and I am
retrieving articles to other articles on the server such as
news://newsclip.ap.org/[EMAIL PROTECTED]
Now I am wondering how I query for that article based off of the url?
I assume D8L4MFAG0 is an id of some sort but when I try and retrieve
that article via myNntpObject.article('D8L4MFAG0') I get an error of
423 Bad article number. Which makes sense as all the other article
numbers are integers.
D8L4MFAG0 actually looks like a doc-id value for an NITF article
stored on the NNTP server which I am retrieving content off of.
Anyone have any ideas on how I fetch this content?
Have a look at the 'Message-ID' header of articles on the server. They
usually start and end with and end with .
An example from comp.lang.python:
[EMAIL PROTECTED]
You probably got the 423 Bad article number error because there
wasn't a and in your message ID, so it tried to parse it as an
article number instead.
I couldn't check your example because newsclip.ap.org requires a login.
David.
--
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Re: display monochromatic images wxPython
[EMAIL PROTECTED] wrote: I want to write a GUI program with wxPython displaying an image. Then be sure to check out the wxPython demo application. It displays lots of images. Regards, Björn -- BOFH excuse #217: The MGs ran out of gas. -- http://mail.python.org/mailman/listinfo/python-list
ioctl.py
Gabriel Genellina wrote:
En Fri, 25 Apr 2008 09:30:56 -0300, Neal Becker [EMAIL PROTECTED]
escribió:
I need an ioctl call equivalent to this C code:
my_struct s;
s.p = p; a pointer to an array of char
s.image_size = image_size;
return (ioctl(fd, xxx, s));
I'm thinking to use python array for the array of char, but I don't see
how
to put it's address into the structure.
Use the array's buffer_info() method:
buffer_info(): Return a tuple (address, length) giving the current
memory address and the length in elements of the buffer used to hold
array's contents.
http://docs.python.org/lib/module-array.html
and you can use the struct module to build my_struct.
Maybe ctypes is the answer?
It could be used too, but I think that in this case it's harder to use
ctypes.
Here is what ioctl should be:
from ctypes import *
libc = CDLL ('/lib/libc.so.6')
#print libc.ioctl
libc.ioctl.argtypes = (c_int, c_int, POINTER (eos_dl_args_t))
_IOC_WRITE = 0x1
_IOC_NRBITS=8
_IOC_TYPEBITS= 8
_IOC_SIZEBITS= 14
_IOC_DIRBITS= 2
_IOC_NRSHIFT= 0
_IOC_TYPESHIFT= (_IOC_NRSHIFT+_IOC_NRBITS)
_IOC_SIZESHIFT= (_IOC_TYPESHIFT+_IOC_TYPEBITS)
_IOC_DIRSHIFT= (_IOC_SIZESHIFT+_IOC_SIZEBITS)
def _IOC (dir, type, nr, size):
return (((dir) _IOC_DIRSHIFT) | \
((type) _IOC_TYPESHIFT) | \
((nr)_IOC_NRSHIFT) | \
((size) _IOC_SIZESHIFT))
def ioctl (fd, request, args):
return libc.ioctl (fd, request, args)
--
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Re: nntplib retrieve news://FULL_URL
[EMAIL PROTECTED] wrote:
So I have established a connection to an nntp server and I am
retrieving articles to other articles on the server such as
news://newsclip.ap.org/[EMAIL PROTECTED]
Now I am wondering how I query for that article based off of the url?
I assume D8L4MFAG0 is an id of some sort but when I try and retrieve
that article via myNntpObject.article('D8L4MFAG0') I get an error of
423 Bad article number. Which makes sense as all the other article
numbers are integers.
You should study a little bit NNTP RFCs ;-)
Anyway [EMAIL PROTECTED] could be the Message-ID of the article, a 'unique'
identifier associated to each article, while the Article Number is unique on
the server (but it changes on different servers).
the nntplib NNTP.article command can accept either Message-ID or Number as
argument, but if you want to use Message-ID you need to enclose it in brackets
.
So in your case this query should work:
myNntpObject.article('[EMAIL PROTECTED]')
Regards.
--
Love is an irresistible desire to be irresistibly desired.
_ _ _
| \| |___ _ __ ___ __(_)___
| .` / -_) ' \/ -_|_- (_-
|_|\_\___|_|_|_\___/__/_/__/ http://xpn.altervista.org
--
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API's and hardware communication. Newbie
Hi all I am new to this group so 'Hello All' I have a PC which is running linux and in it have installed a digital satellite card. I would like to write some software to access the card, tune it and bring back video. Basically a home brew DVB-s application. Being a non/new programmer (apart from some basic too many years ago) I decided to teach my self Python as from what i have read it's an easy and powerfull language to learn. I have been at it a few weeks and am getting on OK and finding it reasonably OK to pick up. The problem is i can find little to no information on programming for DVB cards or on how to access the Linux tv API in Python but I can find lots of information in C. This is making me think should i bother with Python and just learn C even though this will probably take a lot longer. Can some one help me or point me at a resource somewhere or would it be best to just learn C instead. I am aware this is a complicated little project for someone just starting out but it will be a multifaceted program with loads of interesting classes, functions and loops and i don't have to start with the really difficult stuff first. I just want to know if it's possible under python to access the DVB card and if so how? Cheers Grayham -- http://mail.python.org/mailman/listinfo/python-list
Re: Logging ancestors ignored if config changes?
One way to handle this is to make creation of module-level Loggers lazy, and make sure that logging initialisation occurs before any other logging is actually used (which is not so hard - just init log at the start of the application). Of course, there's a performance hit... For example: class Log(object): def __init__(self, name): super(Log, self).__init__() self._name = name self._lazy = None def __getattr__(self, key): if not self._lazy: self._lazy = logging.getLogger(self._name) return getattr(self._lazy, key) and then, in some module: from acooke.util.log import Log log = Log(__name__) [...] class Foo(object): def my_method(self): log.debug(this works as expected) Andrew -- http://mail.python.org/mailman/listinfo/python-list
Re: Receive data from socket stream
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Re: Loading associated files
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Re: Logging ancestors ignored if config changes?
On 26 Apr, 04:02, andrew cooke [EMAIL PROTECTED] wrote: Hi, I am seeing some odd behaviour withloggingwhich would be explained if loggers that are not defined explicitly (but which are controlled via their ancestors) must be created after theloggingsystem is configured via fileConfig(). That's a bit abstract, so here's the problem itself: I define my log within a module by doing importlogging log =logging.getLogger(__name__) Now typically __name__ will be something like acooke.utils.foo. That happens before the application configureslogging, which it does by callinglogging.config.fileConfig() to load a configuration. If I do that, then I don't see anyloggingoutput from acooke.utils.foo (when using log from above after fileConfig has been called) unless I explicitly define a logger with that name. Neither root nor an acooke logger, defined in the config file, are called. Is this a bug? Am I doing something stupid? To me the above seems like a natural way of using the system... Thanks, Andrew It's not a bug, it's by design (for better or worse). A call to fileConfig disables all existing loggers which are not explicitly named in the new configuration. Configuration is intended for one-off use rather than in an incremental mode. Better approaches would be to defer creation of the loggers programmatically until after the configuration call, or else to name them explicitly in the configuration. Regards, Vinay Sajip -- http://mail.python.org/mailman/listinfo/python-list
Python(2.5) reads an input file FASTER than pure C(Mingw)
Both codes below read the same huge(~35MB) text file.
In the file 100 lines, the length of each line 99 chars.
Stable result:
Python runs ~0.65s
C : ~0.70s
Any thoughts?
import time
t=time.time()
f=open('D:\\some.txt','r')
z=f.readlines()
f.close()
print len(z)
print time.time()-t
m=input()
print z[m]
#include cstdio
#include cstdlib
#include iostream
#include ctime
using namespace std;
char vs[1002000][99];
FILE *fp=fopen(D:\\some.txt,r);
int main() {
int i=0;
while (true) {
if (!fgets(vs[i],999,fp)) break;
++i;
}
fclose(fp);
cout i endl;
cout clock()/CLOCKS_PER_SEC endl;
int m;
cin m;
cout vs[m];
system(pause);
return 0;
}
--
http://mail.python.org/mailman/listinfo/python-list
Re: Setting an attribute without calling __setattr__()
Hrvoje Niksic wrote:
Hrvoje Niksic [EMAIL PROTECTED] writes:
Joshua Kugler [EMAIL PROTECTED] writes:
self.me = []
self.me = {}
Use object.__setattr__(self, 'me') = [] and likewise for {}.
Oops, that should of course be object.__setattr__(self, 'me', []).
--
http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial - send and receive characters through linux serial port
On 2008-04-25, terry [EMAIL PROTECTED] wrote: I am trying to send a character to '/dev/ttyS0' and expect the same character and upon receipt I want to send another character. I tired with Pyserial but in vain. Pyserial works. I've been using it almost daily for many years. Either your program is broken, your serial port is broken, or the device connected to the serial port is broken. Test Set up: 1. Send '%' to serial port and make sure it reached the serial port. 2. Once confirmed, send another character. I tried with write and read methods in Pyserial but no luck. Can you help? Ah yes, the problem is in line 89 of your program. We've no way to help if you don't provide details. If you really want help, write as small a program as possible that exhibits the problem. I'd like to emphasize _small_. The larger the program the less likely people are to look at it, and the less likely they are to find the problem if they do look at it. Much of the time the exercise of writing a small demo program will lead you to the answer. If not, then post it, along with the output from the program that shows the problem. Then we can tell you what you did wrong. -- Grant Edwards grante Yow! I'm also against at BODY-SURFING!! visi.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Setting an attribute without calling __setattr__()
Consider reading the *second* paragraph about __setattr__ in section 3.4.2 of the Python Reference Manual. if you are simply going to answer rtfm - might as well kept it to yourself. -- http://mail.python.org/mailman/listinfo/python-list
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Re: Python(2.5) reads an input file FASTER than pure C(Mingw)
On Apr 26, 11:10 am, n00m [EMAIL PROTECTED] wrote:
Both codes below read the same huge(~35MB) text file.
In the file 100 lines, the length of each line 99 chars.
Stable result:
Python runs ~0.65s
C : ~0.70s
Any thoughts?
Yes.
Most of the dirty work in the Python example is spent in tight loop
written in C. This is very likely to be faster on Python on Windows
than your C example for several reasons:
1. Python is compiled with Microsoft's C compiler, which produces more
optimal code than Mingw.
2. The Python readline() function has been in the library for a long
time and has had time for many developers to optimize it's
performance.
3. Your pure C code isn't even C, let alone pure C. It's C++. On
most systems, the C++ iostream libraries have a lot more overhead than
C's stdio.
And, finally, we must not fail to observe that you measured these
times without startup, which is obviousy much greater for Python. (Of
course, we only need to point this so it's not misunderstood that
you're claiming this Python process will terminate faster than the C++
one.)
So, I must regrettably opine that your example isn't very meaningful.
import time
t=time.time()
f=open('D:\\some.txt','r')
z=f.readlines()
f.close()
print len(z)
print time.time()-t
m=input()
print z[m]
#include cstdio
#include cstdlib
#include iostream
#include ctime
using namespace std;
char vs[1002000][99];
FILE *fp=fopen(D:\\some.txt,r);
int main() {
int i=0;
while (true) {
if (!fgets(vs[i],999,fp)) break;
++i;
}
fclose(fp);
cout i endl;
cout clock()/CLOCKS_PER_SEC endl;
int m;
cin m;
cout vs[m];
system(pause);
return 0;
}
--
http://mail.python.org/mailman/listinfo/python-list
Re: Setting an attribute without calling __setattr__()
In article [EMAIL PROTECTED], Arnaud Delobelle [EMAIL PROTECTED] wrote: Joshua Kugler [EMAIL PROTECTED] writes: self.me = [] for v in obj: self.me.append(ObjectProxy(v)) Note that is could be spelt: self.me = map(ObjectProxy, v) It could also be spelt: self.me = [ObjectProxy(v) for v in obj] which is my preferred spelling -- Aahz ([EMAIL PROTECTED]) * http://www.pythoncraft.com/ Why is this newsgroup different from all other newsgroups? -- http://mail.python.org/mailman/listinfo/python-list
Re: So you think PythonCard is old? Here's new wine in an old bottle.
In article [EMAIL PROTECTED], John Henry [EMAIL PROTECTED] wrote: But then I looked closer. It turns out the XML file created by QxTransformer is *very* similar in structure when compared to the resource files used in PythonCard. Since there are no GUI builders for QxTransformer, and I can't affort to buy the one for Qooxdoo (Java! Yuk!), I decided to roll up my sleeves, took the Pythoncard's Layout Manager and modified it and created my own Poor Man's Qooxdoo GUI Layout Designer. Cute! When you have working code, please do upload to PyPI. -- Aahz ([EMAIL PROTECTED]) * http://www.pythoncraft.com/ Why is this newsgroup different from all other newsgroups? -- http://mail.python.org/mailman/listinfo/python-list
Re: Setting an attribute without calling __setattr__()
On Sat, 26 Apr 2008 08:28:38 -0700, animalMutha wrote: Consider reading the *second* paragraph about __setattr__ in section 3.4.2 of the Python Reference Manual. if you are simply going to answer rtfm - might as well kept it to yourself. Yes, but if you are telling where exactly to find the wanted information in the documentation, like John did, you are teaching the OP how to fish. Which is a good thing. Much more helpful than your remark anyway. You might as well have kept it to yourself. :-þ Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
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Re: Python(2.5) reads an input file FASTER than pure C(Mingw)
fgets() from C++ iostream library??? I guess if I'd came up with Python reads SLOWER than C I'd get another (not less) smart explanation why it's so. -- http://mail.python.org/mailman/listinfo/python-list
Re: Setting an attribute without calling __setattr__()
[EMAIL PROTECTED] (Aahz) writes:
In article [EMAIL PROTECTED],
Arnaud Delobelle [EMAIL PROTECTED] wrote:
Joshua Kugler [EMAIL PROTECTED] writes:
self.me = []
for v in obj:
self.me.append(ObjectProxy(v))
Note that is could be spelt:
self.me = map(ObjectProxy, v)
^-- I meant obj!
It could also be spelt:
self.me = [ObjectProxy(v) for v in obj]
which is my preferred spelling
I was waiting patiently for this reply... And your preferred spelling
is py3k-proof as well, of course.
I don't write map(lambda x: x+1, L) or map(itemgetter('x'), L) but I
like to use it when the first argument is a named function,
e.g. map(str, list_of_ints).
--
Arnaud
--
http://mail.python.org/mailman/listinfo/python-list
Re: problem with listdir
* Run cmd.exe and see if you can run dir f:\\code\\python\pgmgallery/*.* that causes a message 'Invalid switch - *.*.' * Try using other directories under F: drive in your program and see when you start hitting the problem. i tried that..on some directories in the same drive this gives correct result and returns a list of filenames.however the error occurs on other directories ,looks like a weird windows problem! -- http://mail.python.org/mailman/listinfo/python-list
diffing and uniqing directories
Over years Ive collected tgz's of my directories. I would like to diff and uniq them Now I guess it would be quite simple to write a script that does a walk or find through a pair of directory trees, makes a SHA1 of each file and then sorts out the files whose SHA1s are the same/different. What is more difficult for me to do is to write a visual/gui tool to help me do this. I would guess that someone in the python world must have already done it [The alternative is to use some of the tools that come with version control systems like git. But if I knew more about that option I would not be stuck with tgzs in the first place ;-)] So if there is such software known please let me know. PS Also with the spam flood that has hit the python list I dont know if this mail is being read at all or Ive fallen off the list! -- http://mail.python.org/mailman/listinfo/python-list
Re: Python(2.5) reads an input file FASTER than pure C(Mingw)
n00m [EMAIL PROTECTED] schreef in bericht
news:[EMAIL PROTECTED]
import time
t=time.time()
f=open('D:\\some.txt','r')
z=f.readlines()
f.close()
print len(z)
print time.time()-t
m=input()
print z[m]
#include cstdio
#include cstdlib
#include iostream
#include ctime
using namespace std;
char vs[1002000][99];
FILE *fp=fopen(D:\\some.txt,r);
int main() {
int i=0;
while (true) {
if (!fgets(vs[i],999,fp)) break;
++i;
}
first of all I would rewrite the C loop to:
int main() {
int i=0;
while (fgets(vs[i],999,fp))
++i;
}
but I think that the difference comes from what you do in the beginning of
the C source:
char vs[1002000][99];
this reserves 99,198,000 bytes so expect a lot of cache trashing in the C
code!
Is there an implementation of f.readlines on the internet somewhere?
interested to see in how they implemented it. I'm pretty sure they did it
smarter than just reserve 100meg of data :)
fclose(fp);
cout i endl;
cout clock()/CLOCKS_PER_SEC endl;
int m;
cin m;
cout vs[m];
system(pause);
return 0;
}
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python(2.5) reads an input file FASTER than pure C(Mingw)
SL [EMAIL PROTECTED] schreef in bericht news:[EMAIL PROTECTED] n00m [EMAIL PROTECTED] schreef in bericht news:[EMAIL PROTECTED] using namespace std; char vs[1002000][99]; if (!fgets(vs[i],999,fp)) break; BTW why are you declaring the array as 99 and pass 999 to fgets to read a line? -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling Python code from inside php
Eric Wertman schrieb:
A simple yet dangerous and rather rubbish solution (possibly more of a
hack than a real implementation) could be achieved by using a
technique described above:
?php
echo exec('python foo.py');
This will spawn a Python interpreter, and not be particularly
efficient. You could just as well have used CGI.
I'm in a bit of a similar situation. I decided to use python to
solve problems where I could, in a more regimented fashion. For
instance, I have a set of functions in a script, table.py. After I
set up mod_python to handle requests to a single directory with
python, I can call this with:
?php include(http://localhost/py/table/nodes;); ?
embedded in the page. This is probably pretty hackish too, but at
least it doesn't spawn a new process, and I don't have to solve things
that aren't related to display with php.
You mean opening a local-loop socket instead of a anonymous socket,
hogging at least another apache process and then possibly spawning
another process if the python-script is implemented as real CGI - not
fast_cgi or python - is the better solution? I doubt that. More wasteful
in all aspects, with small to any gain at all.
Unix uses pipes as IPC all the time. I fail to see why that is rubbish.
Diez
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python(2.5) reads an input file FASTER than pure C(Mingw)
On Apr 26, 12:10 pm, n00m [EMAIL PROTECTED] wrote:
Both codes below read the same huge(~35MB) text file.
In the file 100 lines, the length of each line 99 chars.
Stable result:
Python runs ~0.65s
C : ~0.70s
Any thoughts?
import time
t=time.time()
f=open('D:\\some.txt','r')
z=f.readlines()
f.close()
print len(z)
print time.time()-t
m=input()
print z[m]
#include cstdio
#include cstdlib
#include iostream
#include ctime
using namespace std;
char vs[1002000][99];
FILE *fp=fopen(D:\\some.txt,r);
int main() {
int i=0;
while (true) {
if (!fgets(vs[i],999,fp)) break;
++i;
}
fclose(fp);
cout i endl;
cout clock()/CLOCKS_PER_SEC endl;
int m;
cin m;
cout vs[m];
system(pause);
return 0;
}
First try again with pure C code and compile with a C compiler, not
with C++ code and C++ compiler.
Then, tweak the code to use more buffering, to make it more similar
to readline code, like this (not tested):
#include stdio.h
#include time.h
char vs[1002000][100];
char buffer[65536];
int main(void) {
FILE *fp;
int i, m;
clock_t begin, end;
double t;
begin = clock();
fp = fopen(cvspython.txt, r);
i = 0;
setvbuf(fp, buffer, _IOFBF, sizeof(buffer));
while(1) {
if(!fgets(vs[i], 100, fp)) break;
++i;
}
fclose(fp);
printf(%d\n, i);
end = clock();
t = (double)(end - begin)/CLOCKS_PER_SEC;
printf(%g\n, t);
scanf(%d, m);
printf(%s\n, vs[m]);
getchar();
return 0;
}
Finally, repeat your statement again, if necessary.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python(2.5) reads an input file FASTER than pure C(Mingw)
On Apr 26, 1:15 pm, n00m [EMAIL PROTECTED] wrote: fgets() from C++ iostream library??? fgets is part of the standard C++ library and it lives in the std namespace. I guess if I'd came up with Python reads SLOWER than C I'd get another (not less) smart explanation why it's so. -- http://mail.python.org/mailman/listinfo/python-list
Apologize: annoying dictionary problem, non-existing keys
Thank you all for your answers. i get many usefull answers and someone remembered me of avoiding cross-posting. i apologize from all of you, for cross posting and disturbing. that day was not a good day for me... it is my fault.. sory and have nice days... 26 Nisan 2008 Cumartesi 02:52 tarihinde Collin Winter [EMAIL PROTECTED] yazdı: 2008/4/24 bvidinli [EMAIL PROTECTED]: I posted to so many lists because, this issue is related to all lists, this is an idea for python, this is related to development of python... why are you so much defensive ? i think ideas all important for development of python, software i am sory anyway hope will be helpful. Please consult the documentation first: http://docs.python.org/lib/typesmapping.html . You're looking for the get() method. This attribute of PHP is hardly considered a feature, and is not something Python wishes to emulate. Collin Winter 2008/4/24, Terry Reedy [EMAIL PROTECTED]: Python-dev is for discussion of development of future Python. Use python-list / comp.lang.python / gmane.comp.python.general for usage questions. ___ Python-Dev mailing list [EMAIL PROTECTED] http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/bvidinli%40gmail.com -- İ.Bahattin Vidinli Elk-Elektronik Müh. --- iletisim bilgileri (Tercih sirasina gore): skype: bvidinli (sesli gorusme icin, www.skype.com) msn: [EMAIL PROTECTED] yahoo: bvidinli +90.532.7990607 +90.505.5667711 ___ Python-Dev mailing list [EMAIL PROTECTED] http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/collinw%40gmail.com -- İ.Bahattin Vidinli Elk-Elektronik Müh. --- iletisim bilgileri (Tercih sirasina gore): skype: bvidinli (sesli gorusme icin, www.skype.com) msn: [EMAIL PROTECTED] yahoo: bvidinli +90.532.7990607 +90.505.5667711 -- http://mail.python.org/mailman/listinfo/python-list
Re: diffing and uniqing directories
On Apr 26, 1:14 pm, Rustom Mody [EMAIL PROTECTED] wrote: Over years Ive collected tgz's of my directories. I would like to diff and uniq them Now I guess it would be quite simple to write a script that does a walk or find through a pair of directory trees, makes a SHA1 of each file and then sorts out the files whose SHA1s are the same/different. What is more difficult for me to do is to write a visual/gui tool to help me do this. I would guess that someone in the python world must have already done it [The alternative is to use some of the tools that come with version control systems like git. But if I knew more about that option I would not be stuck with tgzs in the first place ;-)] So if there is such software known please let me know. PS Also with the spam flood that has hit the python list I dont know if this mail is being read at all or Ive fallen off the list! I don't want to give you advice; there is profit in diversity, so telling you what I use could negatively unify the diverse group. In another language I know, and I pause to defer to the old and wise on that, Visual Basic (known to make money), certain counterparts like Visual Basic for Applications allow construction of scripts in the owner's other suites. That is, you can write Basic snippets in Excel, Access, and so on. That's one benefit that private ownership leaves, but not everyone is sold on my country's currency/localcy. Perhaps it's in the future of version control systems. Of course, standardization of sufficiency to succeed comes from currency too: success isn't success if it isn't current, per se. Do you have any interest in contributing your mind or hands to developing a solid gui framework? Join a team. -- http://mail.python.org/mailman/listinfo/python-list
python and web programming, easy way...?
Hi, i use currently python for console programming. in past, i tried it for web programming, to use it instead of php. Unfortunately, i failed in my attempt to switch to python. Currently, i make many webbased programs and a Easy Hosting Control Panel (www.ehcp.net) that runs on php, ehcp is a hosting control panel in beta stage.. in fact, i use python, love it and want to switch to it in my all projects, including webbased programs and ehcp. Can your recomment me the easiest, most usable way to use python in web programming.. in past, in my first attemt... i was able to run python as as apache cgi, runned it basicly, but i had many difficulties especially in sessions, cookies... maybe currently there is a solution, but i dont know. Please provide me the quickest/most appropriate solution for web programming in python. i will try to switch to python in ehcp too.. Currently my web programs are simple Object Oriented programs, that basicly uses a few files, in php. i use sessions in use authentications. i currently use php because it is fairly easy to install/run on apache.. you just put it on server, it runs.. i look something like this for python. because python programming is much better than php. Thank you a lot. -- İ.Bahattin Vidinli Elk-Elektronik Müh. --- iletisim bilgileri (Tercih sirasina gore): skype: bvidinli (sesli gorusme icin, www.skype.com) msn: [EMAIL PROTECTED] yahoo: bvidinli +90.532.7990607 +90.505.5667711 -- http://mail.python.org/mailman/listinfo/python-list
